code: def _maybe_validate_prompt_template(self):
      pass
  
file_path: NeMo/nemo/collections/nlp/data/language_modeling/megatron/gpt_sft_chat_dataset.py
imports: import copy
  import torch
  from nemo.collections.common.tokenizers.tokenizer_spec import TokenizerSpec
  from nemo.collections.nlp.data.language_modeling.megatron.gpt_sft_dataset import GPTSFTDataset
  from nemo.utils import logging
label_desc: Use image node_id 1 for calling the GPTSFTChatDataset obj's underlying member method code with example usage: obj._maybe_validate_prompt_template() without return types